Since their YouTube channel, Following Finchmere, has taken flight, showcasing Dr Nell Ward's sustainability transformation at her family's Finchmere estate, it's her partner and colleague, Rav, who's become the star. Amongst Rav's fan mail and gifts, Nell makes the chilling discovery that one person's obsession with him has metamorphosed into a deadly threat.

Just as Finchmere flings open its gates to welcome swarms of visitors to their idyllic summer fete - celebrating rewilding, artisan produce and local crafts - Nell realises the disguised peril has already wormed its way into the heart of Finchmere itself, and the path of destruction soon leads to murder. DI James Clark's and Nell's powers of observation are put to the test to detect the camouflaged predator. With everyone as a suspect, who can Nell really trust when those she loves are in danger?